Chip pocket for cutting shredders and the like



July 24, 1923. 3,462,492

P. s. MITTS ET AL CHIP POCKET FOR CUTTING SHREDDERS AND THE LIKE Filed May 10, 1922 INVENTORS ATTOZNEY atented July 24, 1923.

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PHILIP S. MI'ITS AND WILLIAM J. VTINSTON, OF SAGINAV]. MICHIGAN, ASSIGNORS TO MITTS & MERRILL, OF SAGINA'W, MICHIGAN, A CORPORATION OF MICHIGAN.

CHIP POCKET FOR CUTTING SHREDDERS AND THE LIKE.

AppIication filed May 10, 1922.

To all whom it may concern.

Be it known that we, PHILIP S. Mums and WILLIAM J. /VINsToN, citizens of the United States, both residing at Saginaw, in the county of Saginaw and State of Michigan, have invented certain new and useful Improvements in Chip Pockets for Cutting Shredders and the like; and we do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to cutters and pertains more particularly to that type of cutters known as hogs, used for cutting up refuse lumber.

Our improvement relates more particularly to that type of hog in which a cylindrical knife-carrying drum is employed, a plurality of narrow knives arranged in staggered relation around the drum and projecting outwardly through openings formed in the periphery of the drum.

Drums of this kind have heretofore commonly been formed with pockets in advance of the knives. purpose of giving clearance for the chips as they become severed by the knives.

It is the purpose of our present improvement to overcome the disadvantage which has been found in practice, attendant upon the use of the pockets as heretofore constructed.

These pockets have usually been made of substantially the same width as the width of the knife, the lateral sides of the pockets being upright, that is, perpendicular to the axis of the drum.

It has been found in practice that when material is fed into the machine with the grain chips or splinters are cut slightly longer than the width of the knife, and many are of just the right length to become jammed into pockets having upright end walls such as have been referred to. The splinters become wedged so as to bridge across the pocket from side to side, clogging the recess and preventing free circulation of chips, resulting in improper action of the knives, and accumulation of material in the pocket ahead of the knife.

To overcome this defect, we have devised the improved pocket forming the subject matter of our present invention.

With these and certain other objects in These pockets are for the Serial No. 559,948.

view which will appear later in the specification, our invention comprises the devices described and claimed and the equivalents thereof.

Cur invention is illustrated in the accompanying drawings, in which Fig. 1 is a perspective view of the drum with our improved pocket.

Fig. 2 is an enlarged transverse section on the line 22 of Fig. 1.

Fig. 3 is a fragmentary section on the line 33 of Fig. l.

As is clearly shown in the drawings, the improved pocket consists in the usual recess 1 formed in the periphery of the drum, the bottom of the recess being curved from the knife end or rear end of the pocket to the forward or advancing end of the pocket. The rear wall of the recess is preferably disposed as shown in Fig. 2 substantially at right angles to the plane of the knife, the knife being flared and having its cutting edge beveled outwardly, as shown in Fig. 2.

In our improvement the wall 2, 2 ofthe pocket extend lengthwise the pocket, that is, from the advancing edge of the pocket to its rear edge, these walls being substantially equidistant apart throughout their length. The walls 2, 2 are formed with an outward flare, substantially as shown in Fig. 3 thus making the pocket have approximately the appearance of a rectangular bowl. The width of the bottom of the pocket is preferably equal to or greater than the width of the knife. By this arrangement it is not possible for chips or splinters that are cut by the knife when the material is fed with the grain, that is, the grain parallel with the cutting edges of the knives, to become wedged across the pocket from side to side. Consequently during the cutting action of the drum the pockets are always clear, permitting the material to escape as rapidly as it is out.

By the means above described we have produced simple and inexpensive pocket adapted to be used in cutting drums of the class described, whereby we entirely avoid the danger of clogging at the proper operating speeds of the drum.

Having thus described our invention, what we claim and desire to secure by Letters Patent is:

1. In a drum of the class described, a plurality of cutting knives, a pocket formed in said drum in advance of the edge of each pocket substantially uniform throughout the 10 knife, the Width of the bottom of said length of said pocket, the sides of said pocket substantially uniform throughout the pocket fizz-red outwardly from the bottom length of said pocket, an end of said pocket thereof, for the purposes set forth.

5 flared outwardly. In testimony whereof We affix our signa- 2. In a drum of the class described, a plutures.

rality oi cutting knives, a pocket formed in I said drum in advance of the edge of each PHILIP S. MITTS. knife, the Width of the bottom of said VVI-LLIAMJ. WVINSTON. 

